Miniature electric lamp bulb seat



P. KOLLSMAN Re.20,937

MINIA'I URE ELECTRIC LAMP BULB SEAT AND SOCKET COMBINATION Dec 6, 1938.

iNvEN'rR FFIUL KULLSNHN ATTORNEY Original Fil ed May 1, 1957 nam d Dec.s, 1938 UNITED STATES IHINIATURE ELECTRIC LAMP BULB SEAT AND SOCKETCOMBINATION Paul Kollsman,

Original No. 2,088,559, dated May 1, 1937. issue October 10, 1938,

18 Claims.

the removal and replacement of such a miniature shown in theaccompanying drawing to which the claims are directed solely forpurposes of 11- vi lustration.

New York, Y.

July 27, 1937, Serial Application for re- Serial N 0. 234,270

In the drawing Fig.v 1 shows my plug base and socket. constructionmolded as an excrescence from the case of aninstrument to beilluminated, the parts being shown for the most part in vertical.section; v

Fig. 2 is a similar view of my plug and socket combination slightlymodified and applied to an adaptor designed to combine with aninstrument casing by clamping over its fall; and Fig. 3 is a similarView of my plug and socket combination of another slightly modified formassociated with the glass front portion of the case of an instrument tobe illuminated.

In each of the embodiments A, A, A", light structure or lamp baseassembly ing a base mounting of a miniature incandescent electric lightbulb B. C, C, C", are respective cooperative sockets for mounting thebulb bases A, A and A".

In Fig. 1 the socket Ois molded as an extension or excrescence Iextending out from the casing 2 of an instrument to be illuminated atits dial back of the glass window 3. Into this excrescence I is formeda, female threaded socket an electrical contact member 4 which iselectrically connected with a current supply lead 5. An arcuate ledge 6is also molded into the excrescence I to seat an is shown in the form ofa circularly bent wire lying on ledge 6 from which its leg 8 extendsdown into connection with a second current lead 9. The leads 5 and 9 maybe imbedded and held by cement III in a channel formed in the exteriorwall of casing 2.

An open ended cylindrical channel II is provided by the socket G intoand through which the bulb B projects, when in instrument illuminatingposition as shown by the dotted lines. This cylindrical channel isco-axial with the t eads but needs merely be of suitable size and sha topass the cylindrical plug and bulb A-B. In this 4 construction lightfrom the filament I3 eifects illumination edgewise through the window 3as fully described in one of my aforementioned copending applications.

In this combination structure of Fig. 1 the bulb B is surrounded by acylindrical miniature sleeve or metallic holder member l4 having anoutstanding ledge l5. To this sleeve is connected one of the bulb leadsor terminal leads l6.

A cylindrical insulating ring or nipple I'I assists ininsulating andseating a. cylindrical pluglike metallic nipple or plugbase member I8concentricallyabout the structure To the closing cap portion or fingeroperable grip portion I9 of this nipple is secured the other bulb leador terminal In all the figures of the drawing and a closed fingeroperable gripper portion;

lead 00. In all embodiments the nipple structure particularly the capportion I0 is closed and serves as a shield against the outward emissionof light. An insulating cementitious filling 2| completes the assemblageand causes the entire plug shaped base to constitute a unit except forthe'packing washer 22 which may be held in place frictionally and serveto complete a hermetical seal when the plug A is inserted in socket C.

In the construction of Fig. 2 the socket 0' comprises a cylindricalinternally female threaded metallic nipple internally of which ismounted a second electrical contact sleeve I0 which is insulated fromthe other parts by insulating rings II and 12. The terminal leads [3 and14 are connected to the metal nipple l0 and to the sleeve and may extendback 'from an adaptor in the form of a cable 16. .This adaptor I5 isshown seated upon an instrument casing 11.

In the plug structure of Fig. 2 the contact sleeve I4 alone is employed,the ledge I5 being omitted but is substituted by a sealing or packingwasher I50. 7 In other respects the structure corresponds to that ofFig. 1.

In Fig. 3 instead of seating 400 by means of a cement II in a moldedpocket 42 of an adaptor, it is shown cemented directly by means of acylindrical reduced sleeve 0| in a suitable perforation in the glasswindow part of an instrument 402. In this construction the contactsleeve I00 is shown provided with resilient struck out fingers "I. Thesleeve I00 is similarly insulated from the metal socket part 400 inaccordance with the showing of Fig. 2. This construction is thatillustrated and described in my co-pending application, Serial No.719,115. In this the extreme tip of bulb B has an opaque shield b,formed in any suitable way as by paintingthe tip of the bulb.

the metal nipple the mounting panel I00 is shown mounting theinstruments in its rear as is customary, slagwing through suitablecut-outs IOI, I01, and I Although I have shown 3 modifications of myplug base and socket, including three applications of the same twoinstruments to .be illuminated, I desire it to be understood that othermodifications within the scope of the accompanying claims should beobvious to those skilled in 1 the art and are contemplated as beingwithin the scope of my invention.

What I claim and desire to secure by United States Letters Patent is:

1. In combination, a plug base member having a hollow nipple portionproviding a bulb seat and a closed finger operable gripper portion; saidnipple portion having external combined socketing and electricalcontacting male threaded metallic means; aminiature electric lamp bulbof smaller size than said bulb seat and having terminal leads; a secondmetallic contact of arcuate form embracing said bulb beyond said nippleportion; connections for said leads to said threaded metallic means andsaid second contact; and insulating means securing the terminal portionof said bulb in said seat with the light emitting portion exposedcoaxially therewith and securing said second contact coaxially with saidnipple portion and about said bulb.

2. The construction as in claim 1 with a light shield for the tip of thebulb.

3. In combination, a plug base member having a hollow nipple portionproviding a bulb seat with each instrument the said base nipple portionhaving external combined socketing and electrical contact male threadedmetallic means; a miniature electric lamp bulb of smaller size than saidbulb seat and having terminal leads; a second metallic contact ofcylindrical form embracing said bulb beyond said nipple portion;connections for said leads to said threaded metallic means and saidsecond contact; insulating means securing the terminal portion of saidbulb in said seat with the light emitting portion exposed coaxiallytherewith and securing said second contact coaxially with said nippleportion and about said bulb; a socket open at both ends having a femalethreaded metal mount complementary to said nipple portion andconstituting a first socket contact; and a second socket contactinsulated from said first contact and cooperative with said secondcontact of said plus.

4. In combination, nating device, a lamp, said lamp comprising a in aninstrument illumia base, and a socket, the I closed cylindrical bulb, afilament therein, and conductive leads' to said filament passing throughthe material of said bulb, the said base comprising a cylindrical con-,tact member adjacent said cylindrical bulb having electrical connectionwith and an annular supporting member, and an insulating member holdingthe several members in substantially concentric relationship; the saidsocket comprising members adapted to cooperate with the concentricmembers of said base for the support thereof and electrical connectionthereto.

5. In combination, in an instrument illuminating device, a lamp, a base,and a socket, the said lamp comprising a filament therein, andconductive leads to said filament passing through the material of saidone of said leads,

bulb, the said base comprising a conductive sleeve member around saidcylindrical bulb having electrical contact with one of said leads, asecond metallic member of substantially annular form having a connectionto the other of said leads, a plastic member holding the several membersin substantially concentric relationship; the said socket comprising incombination a conductive member adapted to cooperate with the saidsecond metallic member, an insulating exterior portion for said socket,an electrical supply connection to said conductive member, a secondconductive member and electrical connection thereto adapted to cooperatewith said sleeve member, and a light channel cooperating with saidfilament adjacent said socket.

6. In combination, in an instrument illuminating device, a lamp, a base,and a socket, the said lamp comprising a closed cylindrical bulb, afilament therein, and conductive leads tosaid filament passing throughthe material of said bulb, comprising a conductive sleeve member aroundsaid cylindrical bulb having electrical contact with one of said leads,and a metallic holder member having an annular portion and a connectionto the other of said leads, an annular insulating ring surrounding saidconducting sleeve for the insulating separation thereof from othermembers of said base, a plastic member holding the several members insubstantially concentric relationship, the said socket comprising incombination a cylindrical member adapted to cooperate with the saidholder member, a second conductive member adapted to cooperate with saidsleeve member.

supply connections thereto, and a closed cylindrical bulb, a 4

cooperating with said filament adjacent said inassembly associatedtherewith comprising a sulating'support.

7. Incombination, in an instrument illuminatengaging the said socketmember and a lamp device a socket member adapted to be atmember attachedto the said base and smaller tached to an instrument to be illuminated,and than the socket-gripping portion of the said 5 serted therein,comprising a grouping of cosocket, whereby the said lamp is passablethrough axial members, including a bulb having a fllasaid socket memberoi said assembly and liable ment adjacent one end thereof, a conductivein position.

cylindrical sleeve member therearound, an an- 12. The combination with alamp socket mem- 10 nular insulating member around said sleeve, a herhaving a passage therethroug :0! a lamp bulb. said combination beingadapted to enter the said socketmember; alamp member mounted 15 saidsocket and to carry said lamp through said on the said base, smallerthan the socket-gripsocket to a position adjacent an object to be pingportion of the said base and smaller than illuminated. the passagethrough said socket, rendering the a holder member around said sleeve,and atstructure is entered in and engaged with said as tachedthereto bycement and connected to the socket member.

support and adapted to cooperate with said sleeve finger grip portion, aportion of lesser dimensions member surrounding said bulb, electricalconengageable in the said tubular passageway, the

40 base member having a hollow nipple portion attached to saidsupporting member having an 40 with ember providing a seat and a passageextending ble structure suitable for socket cooperatiom a partially intosaid base member; an electric light lead 01' said bulb: and meanssecuring an end engageable parts extending radially outward portion ofsaid bulb in said seat with the light from said bulb but leaving a lightemitting poremitting portion 01' said bulb exposed substantion 01' saidbulb free for bulb-first insertion into tially coaxially therewith.asocket.

11. In combination, alamp socket member hav- 17. In combination, a lampbase member having apassage therethrough; a lamp and base has a hollowportion forming a lamp bulb seat 7 and an attached closed finger gripportion; a miniature electric lamp bulb not exceeding the width of saidhollow portion and said hollow portion; bulb;

said lamp -member comprising a tubular socket portion and a chamberportion adjacent an illuminable object, e said tubular socket portionreceiving the sa lamp base member, the said miniature electric lamp bulbextending into said chamber positioned in and sa d lamp said chambersaid illuminable object. I

18. In combination, a miniature electric lamp bulb; a base tor thesupport thereof; a socket member for the releasable support of saidbase; a

. chamber adjacent said socket and aligned therewith, said bulb beingpassable through said socket and flxable by said base in said chamber;and a finger grip member attached to said base for inserting said bulbthrough said socket and for inserting said base into grippingrelationship in said socket.

I PAULKOLLBMAN.

bulbbeyond said socket and in in illuminating relationship with

